Patents by Inventor Porter D. Sherman

Porter D. Sherman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Helicopter turn coordination and heading hold mode control
    Patent number: 5299759
    Abstract: A mode control (25) controls a helicopter flight control system (21) between a heading hold mode and a turn coordination mode according to switching patterns resembling the natural response of an expert pilot to flight conditions. Helicopter operating parameters (31,30) are detected (31,29) and each parameter's detected value is converted from a crisp value to a fuzzy input (100). A new mode fuzzy output is provided by applying a compositional rule of inference (105) across each fuzzy input and a composite mode selection rule base (110). The new mode fuzzy output is converted into a crisp value (112) which is used to determine whether the flight control system operates in the heading hold mode or the turn coordination mode.
    Type: Grant
    Filed: June 1, 1992
    Date of Patent: April 5, 1994
    Assignee: United Technologies Corporation
    Inventors: Porter D. Sherman, David H. Hetzler, Paul Weisser, Jr., Stuart C. Wright